11640-821 データシートの表示（PDF） - AMI Semiconductor

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11640-821

Dual PLL Clock Generator IC

AMI Semiconductor 

FS6244

Dual PLL Clock Generator IC

1.0 Features

• Dual phase-locked loop (PLL) device with three out-

put clock frequencies

• On-chip crystal oscillator for reference frequency

generation

• 3.3V or 5V supply voltage available

• Small circuit board footprint (16-pin 0.150″ SOIC)

• Custom frequency selections available - contact your

local AMI Sales Representative for more information

2.0 Description

The FS6244 is a monolithic CMOS clock generator IC

designed to minimize cost and component count in digital

video/audio systems.

Two high-resolution phase-locked loops generate three

output clocks through an array of post-dividers. All fre-

quencies are ratiometrically derived from the crystal os-

cillator frequency. The locking of all the output frequen-

cies together can eliminate unpredictable artifacts in

video systems and reduce electromagnetic interference

(EMI) due to frequency harmonic stacking.

Figure 1: Pin Configuration

n/c 1

XOUT 2

XIN 3

VDD 4

VSS 5

CLKA 6

n/c 7

n/c 8

16 n/c

15 n/c

14 CLKB

13 VDD

12 n/c

11 VSS

10 CLKC

9 n/c

16-pin (0.150″) SOIC

Table 1: Version Information

DEVICE

VDD

(nom)

FS6244-03

5

FXIN

(MHz)

27.000

CLKA

(MHz)

11.2896

(+1.1 ppm)

NOTE: Contact AMI for custom versions

CLKB

(MHz)

3.6864

CLKC

(MHz)

27.000

Figure 2: Block Diagram

XIN

XOUT

CRYSTAL

OSC.

CLKA

PLL

PLL

DIVIDER

ARRAY

CLKB

CLKC

FS6244

American Microsystems, Inc. reserves the right to change the detail specifications as may be required to permit improvements in the design of its products.

ISO9001

2.28.02

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